Malicious PDF — malware analysis report

Static analysis result for SHA-256 79385e752c8b3d7a…

MALICIOUS

PDF

51.6 KB Created: 2020-07-08 12:46:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 74464806f28c9d66bcfde8406e9d2cbd SHA-1: 748f583f67adf09a8ec1053eb249a3a06b7f7025 SHA-256: 79385e752c8b3d7a36274dffebccb43d8c042934cb12681341e8e74225286b82
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of embedded links, many of which point to domains associated with link farms and redirectors. The primary redirector URL, https://ttraff.ru/wb?keyword=baixar%20pdf%20gratis%20livros, is designed to lure users with the promise of free books, but ultimately leads to malicious infrastructure. The heuristic firings confirm the presence of a malicious redirector and a link farm, indicating a phishing or malware distribution attempt.

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/wb?keyword=baixar%20pdf%20gratis%20livros
    • http://files.funny-jokes-quotes.com/uploads/1/3/1/6/131636914/kazafekapiforamumad.pdf
    • http://files.hordlevoluntarycare.org/uploads/1/3/0/8/130874413/zoladamalija.pdf
    • http://files.campverdecommunitychurch.org/uploads/1/3/0/7/130740232/rafukofaxoj-loramur-zitodat-mudoludi.pdf
    • http://files.sallysweetland.com/uploads/1/3/1/4/131438249/e377953a8cde1ef.pdf
    • http://files.farmarcadia.com/uploads/1/3/0/9/130969242/dotasuwora_dazikuna_foxesajezasowa.pdf
    • http://files.mgtconcepts.com/uploads/1/3/1/4/131453725/pipadejirivuvo_gazugubagaxux_fugaradonebo.pdf
    • http://files.thenauticalartsworkshop.com/uploads/1/3/1/6/131606035/bikebawifutir.pdf
    • https://setiruru.files.wordpress.com/2020/06/bojorivudoxuxuxapusaxa.pdf
    • https://xoduwataneno.files.wordpress.com/2020/06/50268976726.pdf
    • https://virebon.files.wordpress.com/2020/06/kufarifagapatevipogim.pdf
    • https://fojepododur.files.wordpress.com/2020/07/setosutiworabafi.pdf
    • https://budekukagok.files.wordpress.com/2020/06/6954435894.pdf
    • https://noratum.files.wordpress.com/2020/06/sabatevipewe.pdf
    • https://borakav.files.wordpress.com/2020/07/8065821617.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b3f.bin
0ea481d09d3c770afe93d428a123062f354a28061b63cd018adb2dc1784e61c2
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B3F 4952 bytes
font_01_sfnt_off00007c24.bin
51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C24 1800 bytes
font_02_sfnt_off000084b2.bin
9bc45141ad2632c23e5bbcc2b99a5efe67463f8909a2a4e480e461592a4d0c09
pdf-font-stream PDF embedded font (sfnt) at offset 0x84B2 12012 bytes
font_03_sfnt_off0000aa61.bin
4b52fd5da643d9c08cc0a86f773b2f024e3274f3f861dfcac100db1ef433cf06
pdf-font-stream PDF embedded font (sfnt) at offset 0xAA61 16164 bytes